1学生成绩管理系统V4.0
抄的
#include
#include
#define MAX_LEN 10 /* 字符串最大长度 */
#define STU_NUM 30 /* 最多的学生人数 */
#define COURSE_NUM 6 /* 最多的考试科目数 */
int Menu(void);
void ReadScore(long num[], char name[][MAX_LEN], float score[][COURSE_NUM], int n, int m);
void AverSumofEveryCourse(float score[][COURSE_NUM], int n, int m);
void AverSumofEveryStudent(float score[][COURSE_NUM], int n, int m, float sum[STU_NUM], float aver[STU_NUM]);
int Descending(float a, float b);
int Ascending(float a, float b);
void SwapFloat(float* x, float* y);
void SwapLong(long* x, long* y);
void SwapChar(char x[], char y[]);
void SortbyScore(long num[], char name[][MAX_LEN], float score[][COURSE_NUM], float sum[], float aver[], int n, int m, int (*compare)(float a, float b));
void AsSortbyNum(long num[], char name[][MAX_LEN], float score[][COURSE_NUM], float sum[], float aver[], int n, int m);
void SortbyName(long num[], char name[][MAX_LEN], float score[][COURSE_NUM], float sum[], float aver[], int n, int m);
void SearchbyNum(long num[], char name[][MAX_LEN], float score[][COURSE_NUM], float sum[], float aver[], int n, int m);
void SearchbyName(long num[], char name[][MAX_LEN], float score[][COURSE_NUM], float sum[], float aver[], int n, int m);
void StatisticAnalysis(float score[][COURSE_NUM], int n, int m);
void PrintScore(long num[], char name[][MAX_LEN], float score[][COURSE_NUM], float sum[], float aver[], int n, int m);
int main()
{
int n, p, m;
long num[STU_NUM];
char name[STU_NUM][MAX_LEN];
float score[STU_NUM][COURSE_NUM], sum[STU_NUM], aver[STU_NUM];
printf("Input student number(n<30):\n");
scanf("%d", &n);
Menu();
while (scanf("%d", &p) != EOF && p != 0)
{
switch (p)
{
case 1:printf("Input course number(m<=%d):\n", n);
scanf("%d", &m);
printf("Input student's ID, name and score:\n");
ReadScore(num, name, score, n, m);
break;
case 2:AverSumofEveryCourse(score, n, m);
break;
case 3:AverSumofEveryStudent(score, n, m, sum, aver);
break;
case 4:printf("Sort in descending order by score:\n");
SortbyScore(num, name, score, sum, aver, n, m, Descending);
break;
case 5:printf("Sort in ascending order by score:\n");
SortbyScore(num, name, score, sum, aver, n, m, Ascending);
break;
case 6:printf("Sort in ascending order by number:\n");
AsSortbyNum(num, name, score, sum, aver, n, m);
break;
case 7:printf("Sort in dictionary order by name:\n");
SortbyName(num, name, score, sum, aver, n, m);
break;
case 8:printf("Input the number you want to search:\n");
SearchbyNum(num, name, score, sum, aver, n, m);
break;
case 9:printf("Input the name you want to search:\n");
SearchbyName(num, name, score, sum, aver, n, m);
break;
case 10:StatisticAnalysis(score, n, m);
break;
case 11:PrintScore(num, name, score, sum, aver, n, m);
break;
default:printf("Input error!\n");
}
Menu();
}
printf("End of program!");
return 0;
}
int Menu(void)
{
printf("Management for Students' scores\n"
"1.Input record\n"
"2.Caculate total and average score of every course\n"
"3.Caculate total and average score of every student\n"
"4.Sort in descending order by score\n"
"5.Sort in ascending order by score\n"
"6.Sort in ascending order by number\n"
"7.Sort in dictionary order by name\n"
"8.Search by number\n"
"9.Search by name\n"
"10.Statistic analysis\n"
"11.List record\n"
"0.Exit\n"
"Please Input your choice:\n");
return 0;
}
void ReadScore(long num[], char name[][MAX_LEN], float score[][COURSE_NUM], int n, int m)
{
int i, r;
for (i = 0; i < n; i++)
{
scanf("%ld%s", &num[i], name[i]);
for (r = 0; r < m; r++)
{
scanf("%f", &score[i][r]);
}
}
return;
}
void AverSumofEveryCourse(float score[][COURSE_NUM], int n, int m)
{
int i, r;
float sum = 0;
for (i = 0; i < m; i++)
{
sum = 0;
for (r = 0; r < n; r++)
{
sum = sum + score[r][i];
}
printf("course %d:sum=%.0f,aver=%.0f\n", i + 1, sum, sum / (float)n);
}
return;
}
void AverSumofEveryStudent(float score[][COURSE_NUM], int n, int m, float sum[STU_NUM], float aver[STU_NUM])
{
int i, r;
memset(sum, 0, sizeof(float) * STU_NUM);
for (i = 0; i < n; i++)
{
for (r = 0; r < m; r++)
{
sum[i] = sum[i] + score[i][r];
}
aver[i] = sum[i] / (float)m;
}
for (i = 0; i < n; i++)
{
printf("student %d:sum=%.0f,aver=%.0f\n", i + 1, sum[i], aver[i]);
}
return;
}
void SwapFloat(float* x, float* y)
{
float term;
term = *x;
*x = *y;
*y = term;
return;
}
void SwapLong(long* x, long* y)
{
long term;
term = *x;
*x = *y;
*y = term;
return;
}
void SwapChar(char x[], char y[])
{
char c[MAX_LEN];
strcpy(c, x);
strcpy(x, y);
strcpy(y, c);
return;
}
int Descending(float a, float b)
{
if (a < b)
return 1;
return 0;
}
int Ascending(float a, float b)
{
if (a > b)
return 1;
return 0;
}
void SortbyScore(long num[], char name[][MAX_LEN], float score[][COURSE_NUM], float sum[], float aver[], int n, int m, int (*compare)(float a, float b))
{
int i, r, t;
for (i = 0; i < n; i++)
{
for (r = 0; r < n - 1; r++)
{
if ((*compare)(sum[r], sum[r + 1]))
{
SwapLong(&num[r], &num[r + 1]);
SwapChar(name[r], name[r + 1]);
for (t = 0; t < m; t++)
{
SwapFloat(&score[r][t], &score[r + 1][t]);
}
SwapFloat(&sum[r], &sum[r + 1]);
SwapFloat(&aver[r], &aver[r + 1]);
}
}
}
for (i = 0; i < n; i++)
{
printf("%ld\t%s\t", num[i], name[i]);
for (r = 0; r < m; r++)
{
printf("%.0f\t", score[i][r]);
}
printf("%.0f\t%.0f\n", sum[i], aver[i]);
}
return;
}
void AsSortbyNum(long num[], char name[][MAX_LEN], float score[][COURSE_NUM], float sum[], float aver[], int n, int m)
{
int i, r, t;
for (i = 0; i < n; i++)
{
for (r = 0; r < n - 1; r++)
{
if (num[r] > num[r + 1])
{
SwapLong(&num[r], &num[r + 1]);
SwapChar(name[r], name[r + 1]);
for (t = 0; t < m; t++)
{
SwapFloat(&score[r][t], &score[r + 1][t]);
}
SwapFloat(&sum[r], &sum[r + 1]);
SwapFloat(&aver[r], &aver[r + 1]);
}
}
}
for (i = 0; i < n; i++)
{
printf("%ld\t%s\t", num[i], name[i]);
for (r = 0; r < m; r++)
{
printf("%.0f\t", score[i][r]);
}
printf("%.0f\t%.0f\n", sum[i], aver[i]);
}
return;
}
void SortbyName(long num[], char name[][MAX_LEN], float score[][COURSE_NUM], float sum[], float aver[], int n, int m)
{
int i, r, t;
for (i = 0; i < n; i++)
{
for (r = 0; r < n - 1; r++)
{
if (strcmp(name[r], name[r + 1]) > 0)
{
SwapLong(&num[r], &num[r + 1]);
SwapChar(name[r], name[r + 1]);
for (t = 0; t < m; t++)
{
SwapFloat(&score[r][t], &score[r + 1][t]);
}
SwapFloat(&sum[r], &sum[r + 1]);
SwapFloat(&aver[r], &aver[r + 1]);
}
}
}
for (i = 0; i < n; i++)
{
printf("%ld\t%s\t", num[i], name[i]);
for (r = 0; r < m; r++)
{
printf("%.0f\t", score[i][r]);
}
printf("%.0f\t%.0f\n", sum[i], aver[i]);
}
return;
}
void SearchbyNum(long num[], char name[][MAX_LEN], float score[][COURSE_NUM], float sum[], float aver[], int n, int m)
{
int i, r;
long number;
scanf("%ld", &number);
for (i = 0; i < n; i++)
{
if (number % 1000 == num[i] % 1000)
{
printf("%ld\t%s\t", num[i], name[i]);
for (r = 0; r < m; r++)
{
printf("%.0f\t", score[i][r]);
}
printf("%.0f\t%.0f\n", sum[i], aver[i]);
return;
}
}
printf("Not found!\n");
return;
}
void SearchbyName(long num[], char name[][MAX_LEN], float score[][COURSE_NUM], float sum[], float aver[], int n, int m)
{
int i, r;
char ch[MAX_LEN];
scanf("%s", ch);
for (i = 0; i < n; i++)
{
if (strcmp(ch, name[i]) == 0)
{
printf("%ld\t%s\t", num[i], name[i]);
for (r = 0; r < m; r++)
{
printf("%.0f\t", score[i][r]);
}
printf("%.0f\t%.0f\n", sum[i], aver[i]);
return;
}
}
printf("Not found!\n");
return;
}
void StatisticAnalysis(float score[][COURSE_NUM], int n, int m)
{
int i, r;
int x[COURSE_NUM][6];
memset(x, 0, sizeof(x));
for (i = 0; i < n; i++)
{
for (r = 0; r < m; r++)
{
if (score[i][r] < 60)
{
x[r][0]++;
}
else if (score[i][r] < 70)
{
x[r][1]++;
}
else if (score[i][r] < 80)
{
x[r][2]++;
}
else if (score[i][r] < 90)
{
x[r][3]++;
}
else if (score[i][r] < 100)
{
x[r][4]++;
}
else
{
x[r][5]++;
}
}
}
for (r = 0; r < m; r++)
{
printf("For course %d:\n", r + 1);
printf("<60\t%d\t%.2f%%\n", x[r][0], (float)x[r][0] * 100 / (float)n);
printf("%d-%d\t%d\t%.2f%%\n", 60, 69, x[r][1], (float)x[r][1] * 100 / (float)n);
printf("%d-%d\t%d\t%.2f%%\n", 70, 79, x[r][2], (float)x[r][2] * 100 / (float)n);
printf("%d-%d\t%d\t%.2f%%\n", 80, 89, x[r][3], (float)x[r][3] * 100 / (float)n);
printf("%d-%d\t%d\t%.2f%%\n", 90, 99, x[r][4], (float)x[r][4] * 100 / (float)n);
printf("%d\t%d\t%.2f%%\n", 100, x[r][5], (float)x[r][5] * 100 / (float)n);
}
return;
}
void PrintScore(long num[], char name[][MAX_LEN], float score[][COURSE_NUM], float sum[], float aver[], int n, int m)
{
int i, r, t;
for (i = 0; i < n; i++)
{
for (r = 0; r < n - 1; r++)
{
if (strcmp(name[r], name[r + 1]) > 0)
{
SwapLong(&num[r], &num[r + 1]);
SwapChar(name[r], name[r + 1]);
for (t = 0; t < m; t++)
{
SwapFloat(&score[r][t], &score[r + 1][t]);
}
SwapFloat(&sum[r], &sum[r + 1]);
SwapFloat(&aver[r], &aver[r + 1]);
}
}
}
for (i = 0; i < n; i++)
{
printf("%ld\t%s\t", num[i], name[i]);
for (r = 0; r < m; r++)
{
printf("%.0f\t", score[i][r]);
}
printf("%.0f\t%.0f\n", sum[i], aver[i]);
}
return;
}
2寻找最高分成绩的学生
#include
#include
void InputScore(int* p, int m, int n);
int FindMax(int* p, int m, int n, int* pRow, int* pCol);
int main()
{
int* pScore, m, n, maxScore, row, col;
printf("Input array size m,n:\n");
scanf("%d,%d", &m, &n);
pScore = (int *)malloc(m*n*sizeof(int)); /* 申请动态内存 */
if (pScore == NULL)
{
printf("No enough memory!\n");
exit(0);
}
InputScore(pScore, m, n);
maxScore = FindMax(pScore, m, n, &row, &col);
printf("maxScore = %d, class = %d, number = %d\n", maxScore, row + 1, col + 1);
free(pScore); /* 释放动态内存 */
return 0;
}
/* 函数功能：输入m行n列二维数组的值 */
void InputScore(int *pScore, int m, int n)
{
int i, j;
printf("Input %d*%d array:\n", m, n);
for (i = 0; i < m; i++)
{
for (j = 0; j < n; j++)
{
scanf("%d", &pScore[i * n + j]);
}
}
}
/* 函数功能：计算任意m行n列二维数组中元素的最大值，并指出其所在行列下标值 */
int FindMax(int* p, int m, int n, int* pRow, int* pCol)
{
int i, j, max = p[0];
*pRow = 0;
*pCol = 0;
for (i = 0; i < m; i++)
{
for (j = 0; j < n; j++)
{
if (p[i * n + j] > max)
{
max = p[i * n + j];
*pRow = i; /*记录行下标*/
*pCol = j; /*记录列下标*/
}
}
}
return max;
}
3程序改错
#include
#define STUD 30 /* 最多可能的学生人数 */
#define COURSE 5 /* 最多可能的考试科目数 */
void Total(int* pScore, int sum[], float aver[], int m, int n);
void Print(int* pScore, int sum[], float aver[], int m, int n);
int main()
{
int i, j, m, n, score[STUD][COURSE], sum[STUD];
float aver[STUD];
printf("How many students?\n");
scanf("%d", &m);
printf("How many courses?\n");
scanf("%d", &n);
printf("Input scores:\n");
for (i = 0; i < m; i++)
{
for (j = 0; j < n; j++)
{
scanf("%d", &score[i][j]);
}
}
Total(score, sum, aver, m, n);
Print(score, sum, aver, m, n);
return 0;
}
void Total(int* pScore, int sum[], float aver[], int m, int n)
{
int i, j;
for (i = 0; i < m; i++)
{
sum[i] = 0;
for (j = 0; j < n; j++)
{
sum[i] += pScore[i * COURSE + j];
}
aver[i] = (float)sum[i] / n;
}
}
void Print(int* pScore, int sum[], float aver[], int m, int n)
{
int i, j;
printf("Result:\n");
for (i = 0; i < m; i++)
{
for (j = 0; j < n; j++)
{
printf("%4d", pScore[i * COURSE + j]);
}
printf("%5d%6.1f\n", sum[i], aver[i]);
}
}
4矩阵转置
#include
#define M 10
#define N 10
void Transpose(int* a, int* at, int m, int n);
void InputMatrix(int* a, int m, int n);
void PrintMatrix(int* at, int n, int m);
int main()
{
int s[M][N], st[N][M], m, n;
printf("Input m, n:\n");
scanf("%d,%d", &m, &n);
InputMatrix(s, m, n);
Transpose(s, st, m, n);
printf("The transposed matrix is:\n");
PrintMatrix(*st, n, m);
return 0;
}
/* 函数功能：计算m*n矩阵a的转置矩阵at */
void Transpose(int* a, int* at, int m, int n)
{
int i, j;
for (i = 0; i < m; i++)
{
for (j = 0; j < n; j++)
{
*(at+j*M+i) = *(a+i*N+j);
}
}
}
/* 函数功能：输入m*n矩阵a的值 */
void InputMatrix(int* a, int m, int n)
{
int i, j;
printf("Input %d*%d matrix:\n", m, n);
for (i = 0; i < m; i++)
{
for (j = 0; j < n; j++)
{
scanf("%d", a+i*N+j);
}
}
}
/* 函数功能：输出n*m矩阵at的值 */
void PrintMatrix(int* at, int n, int m)
{
int i, j;
for (i = 0; i < n; i++)
{
for (j = 0; j < m; j++)
{
printf("%-5d", *(at+i*M+j));
}
printf("\n");
}
}
5在升序排序的数组中插入一个元素
#include
#include
#include
int main()
{
int n;
int insert;
int* p;
printf("Input array size:\n");
scanf("%d", &n);
p = (int*)malloc((n+1) * sizeof(int));
if (p != NULL)
{
printf("Input array:\n");
for (int i = 0; i < n; i++)
scanf("%d", p + i);
}
else
return 0;
printf("Input x:\n");
scanf("%d", &insert);
for (int i = n-1; i >= 0; i--)
{
if (*(p + i) > insert)
*(p + i + 1) = *(p + i);
else
{
*(p + i + 1) = insert;
break;
}
}
printf("After insert %d:\n", insert);
for (int i = 0; i < n + 1; i++)
printf("%4d", *(p+i));
free(p);
return 0;
}
6计算平均数、中位数和众数
#include
int main()
{
int datas[40];
int temp, sum=0;
int maxmode = 1;
int count=0;
int mode_i;
printf("Input the feedbacks of 40 students:\n");
for (int i = 0; i < 40; i++)
{
scanf("%d", datas + i);
}
for (int i = 0; i < 39; i++)
{
for (int j = 0; j < 39 - i; j++)
{
if (datas[j] > datas[j + 1])
{
temp = datas[j]; datas[j] = datas[j + 1]; datas[j + 1] = temp;
}
}
}
sum = datas[0];
for (int i = 1; i < 40; i++)
{
sum += datas[i];
if (datas[i] == datas[i - 1])
{
count++;
if (count > maxmode)
{
mode_i = i;
maxmode = count;
}
}
else
count = 0;
}
printf("Mean value=%d\n", sum / 40);
printf("Median value=%d\n", (datas[19] + datas[20]) / 2);
printf("Mode value=%d\n", datas[mode_i]);
return 0;
}